Costello, John Aloysius 1891-1976. Irish prime minister (1948-1951 and 1954-1957) whom took Ireland out of the Commonwealth of Nations (1949).
Costello, Lou Originally Louis Francis Cristillo. 1906-1959. Us comedian. As part of the Abbott and Costello comedy group he made many films, including Buck Privates (1941) and Abbott and Costello Meet Frankenstein (1948).